#!/usr/bin/env sh
# SPDX-License-Identifier: MIT
# SPDX-FileCopyrightText: 2020-2023 Leah Rowe <leah@libreboot.org>

[ "x${DEBUG+set}" = 'xset' ] && set -v
set -u -e

. "include/err.sh"
. "include/option.sh"

eval "$(setvars "" vdir relname src_dirname srcdir _nogit _xm target romdir \
    microcode_required mode)"

_f="coreboot u-boot seabios flashrom grub memtest86plus uefitool"
_f="${_f} bios_extract biosutilities pico-serprog stm32-vserprog"
_f="${_f} rpi-pico-serprog"

main()
{
	vdir="release"
	while getopts d:m: option; do
		[ -z "${OPTARG}" ] && err "Empty argument not allowed"
		case "${option}" in
		d) vdir="${OPTARG}" ;;
		m) mode="${OPTARG}" ;;
		*) err "Invalid option" ;;
		esac
	done

	vdir="${vdir}/${version}"
	relname="${projectname}-${version}"
	src_dirname="${relname}_src"
	srcdir="${vdir}/${src_dirname}"

	[ -e "${vdir}" ] && err "already exists: \"${vdir}\""

	mkvdir
	build_release
}

mkvdir()
{
	mkdir -p "${vdir}" || err "mkvdir: !mkdir -p \"${vdir}\""

	git_init || err "mkvdir: !git_init \"${vdir}\""
	git clone . "${srcdir}" || err "mkdir: !gitclone \"${srcdir}\""
	[ -z "${_nogit}" ] || x_ rm -Rf ".git"

	rm -Rf "${srcdir}/.git"
	insert_version_files "${srcdir}" || err "mkvdir ${srcdir}: versionfile"
}

# release archives contain .gitignore, but not .git.
# this script can be run from lbmk.git, or an archive.
git_init()
{
	[ -L ".git" ] && err "Reference .git is a symlink"
	[ -e ".git" ] && return 0
	eval "$(setvars "$(date -Rd @${versiondate})" cdate _nogit)"

	git init || return 1
	git add -A . || return 1
	git commit -m "${projectname} ${version}" --date "${cdate}" || return 1
	git tag -a "${version}" -m "${projectname} ${version}" || return 1
}

build_release()
{
	_xm="build_release ${vdir}"
	(
	cd "${srcdir}" || err "${_xm}: !cd \"${srcdir}\""
	fetch_trees
	)
	(
	cd "${srcdir%/*}" || err "${_xm}: mktarball \"${srcdir}\""
	mktarball "${srcdir##*/}" "${srcdir##*/}.tar.xz" || err "${_xm}: mksrc"
	)
	if [ "${mode}" != "src" ]; then
		(
		cd "${srcdir}" || err "${_xm}: 2 !cd \"${srcdir}\""
		mkrom_images
		)
	fi
	rm -Rf "${srcdir}" || err "${_xm}: !rm -Rf \"${srcdir}\""
}

fetch_trees()
{
	for x in ${_f}; do
		./update trees -f "${x}" || err "${_xm}: fetch ${x}"
	done
	for x in config/*/build.list; do
		[ -f "${x}" ] || continue
		xp="${x#*/}"; xp="${xp%/*}"
		[ -L "${xp}" ] || x_ rm -Rf "src/${xp}/${xp}"
	done
	rm -Rf */.git* */*/.git* */*/*/.git* */*/*/*/.git* */*/*/*/*/.git* \
	    */*/*/*/*/*/.git* */*/*/*/*/*/*/.git* */*/*/*/*/*/*/*/.git* \
	    .git tmp || err "${_xm}: rm-dotgit"
}

mkrom_images()
{
	./build roms all || err "${_xm}: roms-all"
	./build serprog rp2040 || err "${_xm}: rp2040"
	./build serprog stm32 || err "${_xm}: stm32"

	for rombuild in bin/*; do
		[ -d "${rombuild}" ] || continue
		handle_rom_archive "${rombuild}"
	done

	mv "release/${version}/roms/" ../roms || err "${_xm}: copy roms/"
}

handle_rom_archive()
{
	builddir="${1}"
	romdir="tmp/romdir"
	x_ rm -Rf "${romdir}"
	target="${builddir##*/}"

	if [ ! -f "config/coreboot/${target}/target.cfg" ]; then
		# No config, just make a tarball
		tarball="release/${version}/roms/${relname}_${target}.tar.xz"
		insert_copying_files "${builddir}"
		mktarball "${builddir}" "${tarball}"
		return 0
	fi

	romdir="${romdir}/bin/${target}"
	x_ mkdir -p "${romdir}"
	x_ cp "${builddir}/"* "${romdir}"

	nukerom

	printf "Generating release/%s/roms/%s-%s_%s.tar.xz\n" \
	    "${version}" "${projectname}" "${version}" "${target##*/}"
	insert_version_files "${romdir}" || \
	    err "mkrom_tarball ${romdir}: versionfile"

	insert_copying_files "${romdir}"
	mkrom_tarball
}

nukerom()
{
	microcode_required="y"
	. "config/coreboot/${target}/target.cfg"
	if [ "${microcode_required}" != "y" ] && \
	    [ "${microcode_required}" != "n" ]; then microcode_required="y"; fi
	if [ "${microcode_required}" = "n" ]; then
		for romfile in "${romdir}"/*.rom; do
			[ -f "${romfile}" ] || continue
			strip_ucode "${romfile}"
		done
		for romfile in "${romdir}"/*.tmprom; do
			[ -f "${romfile}" ] || continue
			x_ mv "${romfile}" "${romfile%.tmprom}.rom"
		done
	fi

	# Hash the images before removing vendor files
	# which "./vendor inject" uses for verification
	x_ rm -f "${romdir}/vendorhashes"
	x_ touch "${romdir}/vendorhashes"
	(
	x_ cd "${romdir}"
	x_ sha512sum *.rom >> vendorhashes
	)

	for romfile in "${romdir}"/*.rom; do
		[ -f "${romfile}" ] || continue
		x_ ./vendor inject -r "${romfile}" -b ${target} -n nuke
	done
}

strip_ucode()
{
	romfile=${1}
	_newrom_b="${romfile%.rom}_nomicrocode.tmprom"
	x_ cp "${romfile}" "${_newrom_b}"
	microcode_present="y"
	"${cbfstool}" "${_newrom_b}" remove -n \
	    cpu_microcode_blob.bin 2>/dev/null || microcode_present="n"
	[ "${microcode_present}" = "n" ] || return 0
	printf "REMARK: '%s' already lacks microcode\n" "${romfile}" 1>&2
	printf "Renaming default ROM file instead.\n" 1>&2
	x_ mv "${romfile}" "${_newrom_b}"
}

insert_copying_files()
{
	x_ rm -Rf "${1}/licenses"
	x_ mkdir -p "${1}/licenses"
	l="${1}/licenses"
	# copy licenses to rom image archive, for completion
	x_ cp "src/grub/COPYING" "${l}/COPYING.grub"
	x_ cp "src/coreboot/default/COPYING" "${l}/COPYING.coreboot"
	x_ cp -R "src/coreboot/default/LICENSES" "${l}/LICENSES.coreboot"
	x_ cp "src/seabios/default/COPYING" "${l}/COPYING.coreboot"
	x_ cp "src/seabios/default/COPYING.LESSER" "${l}/COPYING.LESSER.seabios"
	x_ cp -R "src/u-boot/default/Licenses" "${l}/COPYING.u-boot"
}

mkrom_tarball()
{
	archivename="${relname}_${target##*/}"
	f="release/${version}/roms/${archivename}"
	x_ mkdir -p "${f%/*}"
	(
	x_ cd "${romdir%/bin/${target}}"
	mktarball "bin/${target}" "${archivename}.tar.xz"
	)
	x_ mv "${romdir%/bin/${target}}/${archivename}.tar.xz"* "${f%/*}"

	printf "Created ROM archive: ${f%/*}/${archivename}.tar.xz"
}

insert_version_files()
{
	printf "%s\n" "${version}" > "${1}/version" || return 1
	printf "%s\n" "${versiondate}" > "${1}/versiondate" || return 1
	printf "%s\n" "${projectname}" > "${1}/projectname" || return 1
}

mktarball()
{
	# preserve timestamps for reproducible tarballs
	tar_implementation=$(tar --version | head -n1) || :

	[ "${2%/*}" = "${2}" ] || x_ mkdir -p "${2%/*}"
	if [ "${tar_implementation% *}" = "tar (GNU tar)" ]; then
		tar --sort=name --owner=root:0 --group=root:0 \
		    --mtime="UTC 2023-10-14" -c "${1}" | xz -T0 -9e > "${2}" || \
		    err "mktarball 1, ${1}"
	else
		# TODO: reproducible tarballs on non-GNU systems
		tar -c "${1}" | xz -T0 -9e > "${2}" || err "mktarball 2, ${1}"
	fi
	(
	[ "${2%/*}" != "${2}" ] && x_ cd "${2%/*}"
	x_ sha512sum "${2##*/}" > "${2##*/}.sha512"
	)
}

main $@